Chip-breaker.



No. 840,238. PATENTEDJAN. 1, 1907.

L. J. NELSON.

CHIP BREAKER.

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No. 840,238. PATENTED JAN. 1, 1907.

L. J. NELSON.

- CHIP BREAKER. AEPLIOATIOE FILED SEPT. as. 190s.

LOUIS J. NELSON, OF CHICAGO, ILLINOIS. y

CHIP-BREAKER.

Speccaton of Letters Patent.

Application filed September 25,1905. Serial No. 280,016.

Patented Jan. 1, 1907.

To a/ZZ` whom t may concern:

Be it known that I, LOUIS J. NELSON, a citizen of the United States,residing at Chicago, in the county of Oook and State of Illinois, haveinvented new and useful Improvements in Chip-Breakers, of which thefollowing is a specification.

This invention relates to an improved chip-breaker attachment forplaning, sticking, and analogous woodworking machines, and has for itsobject to provide a device composed of a number of sectional unitsloosely assembled together, but each having an independent action ormovement With reference to the other and operating with the minimum offriction and Anoise and in the most reliable and efficient way. To thisend the said invention consists in the construction and combination ofparts hereinafter more particularly set forth and claimed.

In the drawings, Figure 1 is a front elevation showing part of aplaning-machine embodying the improved features. Fig. 2 is a sectionalelevation of the device proper. Fig 3 is a plan, and Fig. 4 is a frontelevation of the same.

A may represent parts of the machine- Y frame B, the cutter-head B', afeed-roll, and C the feed-table supporting the work on its way throughthe machine, all of which are of the usual construction, and thereforewill not be described in detail.

The chip-breaker or presser-foot D is supported on the free end of anarm 5 and is located between the cutter-head and the feedroll. Theopposite end of the arm 5 has a pivotal bearing 6, so that the same maybe raised or lowered, as required.

A head-plate 7 is rigidly secured to the free end of the arm 5 by anumber of bolts 8. This plate is held in a horizontaly position and isprovided at the rear side with a curvedup edge 9, forming a concavechannel 10 parallel thereto, and on the front edge with a rib 11, asbest shown in Fig. 2.

The breaker proper consists of a number of sections 12, which are of thefoot-shaped contour shown in'Fig. 2. The upper rear heel end of thebreaker sections are each provided with an inturned curved terminal edge13, which corresponds to the curved edge 9 of plate 7 and seats looselyin the channel 10 formed therein, and thus provides a hinge connectionfor a slight swinging or rocking movement when in action. The upperfront ends of the sections are each provided with a lug 14, which restsloosely on rib 11, formed on the front edge of plate 7, and provides asupport andl stop for the down movement of the breaker-sections.

The head-plate 7 is provided in the under side longitudinally with arecess or groove 15, into which is iitted an elastic or spring bar 16,preferably of some india-rubber product. This bar has a continuousbearing on the upper hollowed-out part 17 of each of thebreaker-sections and serves the dual purpose of assisting gravity inexerting a downward pressure thereon and at the same time vprevents thesection from springing upward loosely and dancing on the surface of thework. This elastic bar will'readily permit of the sections being raised,as indicated by dotted lines in Fig. 2, from the upward pressure of thework passing underneath.

The breaker-sections are assembled loosely, so that each has anindependent automatic movement from that of the other in conforming tothe requirements of the work. The sections are retained against lateraldisplacement by means of a screw-bolt 18,

threaded in a bracket 19.

The free end of arm 5 is provided with slots 20, Fig. 3 ,through whichthe clamping-bolts 8 extend in securing the head-plate of the breaker inplace. These slots permit of a lateral adjustment of the breaker whennecessary in bringing the same into a proper working position.

Ordinarily the greater pro ortion of work put through this class of macines is narrow stuif, so that the greater Wear comes on the rst four orfive inside sections and which when worn off too short for use may bereadily replaced with out having to put in an entire breaker.

In ractical working the breaker will be so positloned that the toes 21of the sections will normally rest in the path of the work and will beraised upward from the pressure of the work, each section having anindependent yielding action.

Having thus described my invention, what I claim is- 1. In achip-breaker for planing-machines and analogous mechanism, a head-platehaving a concave channel 10 formed along its upper side parallel and inproximity to one edge and a rib formed at its other edge, in

combination with a series of breaker-sections arranged side by side butfree to rise independently of each other, each, breaker- IOO sectionbeing provided With a part resting on said rib and a rounded art 13curved over to it in the said channelpsubstantially as set forth.

v2. In a chip-breaker for planing-machines and analogous mechanism, thecombination of a head-plate With a pivoted arm, means for attaching saidplate thereto and adjusting it thereon, and a series of parallelbreakersections, arranged side by side and carried by said head-plate,each section having two parts Which rest on parts of said plate, theseparts of said sections and plate being arranged and adapted to permitsaid sections to tilt up on one side individually substantially as setforth.

3. In a planing-machine or analogousv mechanism, a head-plate having atone edge a projecting rib and in proximity to the other edge, Which isconvex, a concave channel 10, in combination With a series ofbreaker-sections arranged side by side and pivoted inde endently, eachsection being provided Wit a part which rests on said rib and anotherpart which is curved to iit over said convex edge of the head-plate andinto said channel, the contiguous parts of said head-plate and saidbreaker-sections constitutin the pivots for said sections substantial yas set forth.

4. In a planing-machine or analogous mechanism, a head-plate having laflanged groove in its under side, a rib at one edge and a channelparallel and in proximity to its other-edge, in combination With aseries of.

breaker-sections arranged side by side, each section being provided WithtWo parts which overlap respectively the edges of said headplate, and abar of resilient material iitted into said ilanged groove and held bythe flanges at the mouth thereof and bearing against the upper edges ofsaid sections, each 0I the latter `bein adapted to pivot independentlyon the c anneled edge of the said head-plate substantially as set forth.

5. In a planing-machine or analogous mechanism, a head-plate having arib at one 'edge and a channel nearthe other, in combination with aseries of breaker-sections arranged side by side and adjustable meansfor preventing their lateral displacement each of said' sections beingprovided with two parts, one of which overlaps the said rib, the otherpart overlapping the other yedge of said headplate, iitting into saidchannel and aiiording a pivotal bearing for said breaker-sectionsubstantially as set forth.

In testimonylwhereof I affix my signature in presence of tWo subscribingWitnesses.

LOUIS J. NELSON.

